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2014 | OriginalPaper | Buchkapitel

9. Filtration

verfasst von : Fernando Concha A.

Erschienen in: Solid-Liquid Separation in the Mining Industry

Verlag: Springer International Publishing

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Abstract

Filtration is the process whereby a solid separates from a fluid by making the suspension pass through a porous bed, known as a filter medium. The bed retains the particles while the fluid passes through the filter medium and becomes a filtrate. To establish a flow of filtrate, it is necessary to apply a pressure difference, called a pressure drop, across the filter medium. There are several ways to do this depending on the driving force, for example: (1) gravity, (2) vacuum, (3) applied pressure, (4) vacuum and pressure combined, (5) centrifugal force, and (6) a saturation gradient. Usually the different driving forces require different filtration equipment called filters. Two main dewatering stages are studied, cake formation and dehumidification, which are studied as mono-phase flow and two-phase flow of a fluid through rigid porous medium, respectively. Field variables and constitutive equations are deduced from the chapter on flow in porous media. Methods of filtration, cake porosity, permeability, capillary curves and relative permeabilities are presented. Finally models of continuous filters are developed.

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Literatur
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Zurück zum Zitat Tiller, F. M. (1953). The role of porosity in filtration. Numerical method for constant rate and constant pressure filtration based on Kozeny′s law. Chemical Engineering Progress, 49(9), 467–479. Tiller, F. M. (1953). The role of porosity in filtration. Numerical method for constant rate and constant pressure filtration based on Kozeny′s law. Chemical Engineering Progress, 49(9), 467–479.
Zurück zum Zitat Tiller, F. M. (1958). The role of porosity in filtration, part III, variable-pressure-variable rate filtration. AIChE Journal, 6(4), 170–174.CrossRef Tiller, F. M. (1958). The role of porosity in filtration, part III, variable-pressure-variable rate filtration. AIChE Journal, 6(4), 170–174.CrossRef
Zurück zum Zitat Tiller, F. M., & Cooper, H. R. (1958). The role of porosity in filtration. Part IV. Constant pressure filtration. AIChE Journal, 6(4), 595–601.CrossRef Tiller, F. M., & Cooper, H. R. (1958). The role of porosity in filtration. Part IV. Constant pressure filtration. AIChE Journal, 6(4), 595–601.CrossRef
Zurück zum Zitat Tiller, F. M., & Cooper, H. R. (1962). The role of porosity in filtration. Part V. Porosity variations in filter cakes. AIChE Journal, 8(4), 445–449.CrossRef Tiller, F. M., & Cooper, H. R. (1962). The role of porosity in filtration. Part V. Porosity variations in filter cakes. AIChE Journal, 8(4), 445–449.CrossRef
Zurück zum Zitat Tiller, F. M., & Shirato, M. (1964). The role of porosity in filtration. Part VI. New definition of filter resistance. AIChE Journal, 10(1), 61–67.CrossRef Tiller, F. M., & Shirato, M. (1964). The role of porosity in filtration. Part VI. New definition of filter resistance. AIChE Journal, 10(1), 61–67.CrossRef
Zurück zum Zitat Tiller, F. M., & Lu, W. (1972). The role of porosity in filtration. Part VIII, cake non-uniformity in compression-permeability cells. AIChE Journal, 18(3), 569–572.CrossRef Tiller, F. M., & Lu, W. (1972). The role of porosity in filtration. Part VIII, cake non-uniformity in compression-permeability cells. AIChE Journal, 18(3), 569–572.CrossRef
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Zurück zum Zitat Wakeman, R. J., & Tarleton, E. S. (1999a). Filtration: Equipment selection, modeling and process simulation (pp. 81–82). Oxford: Elsevier Sci. Wakeman, R. J., & Tarleton, E. S. (1999a). Filtration: Equipment selection, modeling and process simulation (pp. 81–82). Oxford: Elsevier Sci.
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Metadaten
Titel
Filtration
verfasst von
Fernando Concha A.
Copyright-Jahr
2014
DOI
https://doi.org/10.1007/978-3-319-02484-4_9

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